I think fuel economy will be significantly better than on the previous DL1000, based on the simple fact, that it is Euro-2, and this one most likely will be built to comply to the Euro-4. There was a noticeable difference already on the 650 between Euro-2 and Euro-3 (between 2006 & 2007 models).

Those are emission norms, but they have an affect on fuel consumption as well.